<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>bootstrap</title>
    <link rel="stylesheet" href="css/bootstrap.min.css">
</head>
<body >
  <nav class="navbar navbar-default">
    <div class="container-fluid">
      <div class="navbar-header">
        <button class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-btn" >
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
        </button>
        <a class="navbar-brand" href="#">Brand</a>
      </div>
  
      <div class="collapse navbar-collapse" id="bs-btn">
        <ul class="nav navbar-nav">
          <li class="active"><a href="#">111111</a></li>
          <li><a href="#">222222</a></li>
        </ul>

        <form class="navbar-form navbar-left">
          <div class="form-group">
            <input type="text" class="form-control" placeholder="Search">
          </div>
          <button type="submit" class="btn btn-default">Submit</button>
        </form>

        <ul class="nav navbar-nav navbar-right">
          <li><a href="#">LinkA</a></li>
          <li><a href="#">LinkB</a></li>
        </ul>
      </div>
    </div>
  </nav>


  


<script src="js/jquery-3.6.0.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</body>
</html>